[llvm] [CodeGen] Support vectors across all backends (PR #95518)

[Farzon Lotfi via llvm-commits]

farzonl wrote:

Build failure looks  to be caused by lldb timeouts, not related to this change.  same timeout we are seeing here: https://buildkite.com/llvm-project/github-pull-requests/builds/72742#01901673-5e12-4a2f-a9f1-c7047777f32d
https://github.com/llvm/llvm-project/pull/95528

```
_bk;t=1718398634168FAILED: tools/lldb/test/CMakeFiles/check-lldb /var/lib/buildkite-agent/builds/linux-56-59b8f5d88-qjz4k-1/llvm-project/github-pull-requests/build/tools/lldb/test/CMakeFiles/check-lldb 

_bk;t=1718398634168cd /var/lib/buildkite-agent/builds/linux-56-59b8f5d88-qjz4k-1/llvm-project/github-pull-requests/build/tools/lldb/test && /usr/bin/python3.10 /var/lib/buildkite-agent/builds/linux-56-59b8f5d88-qjz4k-1/llvm-project/github-pull-requests/build/./bin/llvm-lit -v --xunit-xml-output /var/lib/buildkite-agent/builds/linux-56-59b8f5d88-qjz4k-1/llvm-project/github-pull-requests/build/test-results.xml --timeout=1200 --time-tests /var/lib/buildkite-agent/builds/linux-56-59b8f5d88-qjz4k-1/llvm-project/github-pull-requests/build/tools/lldb/test
```

So will proceed with merge.

https://github.com/llvm/llvm-project/pull/95518